What color is associated with pure tungsten?

• A. Green
• B. Red
• C. Brown
• D. Blue

Answer: (A)

Color coding on tungsten electrodes helps you identify composition quickly. Green marks pure, unalloyed tungsten, meaning no dopants or oxides added. This is the electrode you’d typically use for many TIG welding tasks when you want clean, stable arc characteristics without dopant-assisted arc starting. The other colors signal different alloyed tungsten types (with thorium, lanthanum, zirconia, and so on), which are selected to improve arc starting, stability, or life under particular currents. So green is the color associated with pure tungsten.